EP0798503B1 - Method, holder and setting device for fixing pipes - Google Patents

Abstract

The pipes (15) are fixed to a covering layer (17) especially covering sheet over insulating plates. Elastic especially plastics U-shaped holders (1) whose arms (4,5) have piercing ends and barbs are placed over the pipe and penetrate the covering layer in which they are fixed by the barbed ends. Before penetrating the covering layer the holders are elastically deformed and pre-tensioned so as to alter the distance between the piercing ends, and are released after the barbs have gone through the covering layer. The holders are inserted into the covering layer by a placement appliance (20) possessing a plunger (22). Deformation elements (26) belonging to the placement appliance exert pressure on the holders during the piercing operation.

Description

The invention relates to a method for fastening pipes, in particular Underfloor heating pipes, on a penetrable cover layer, in particular of insulating plates or sheets, a holder for fastening pipes and a Setting tool for this.

The fastening of underfloor heating pipes on laminated foam sheets often takes place with the help of a so-called tacker system consisting of pipe holders, setting tools and with one for anchoring the holder with a suitable cover layer provided (insulating) pad, in which with the help of a setting tool U-shaped Holders or plastic clips with barbs at the ends of the legs over the fastening heating pipe can be pressed into the insulating foam and where then spread the barbs in the foam and pull under the Anchor the laminated film (see e.g. DE-A-4 005 659 and DE-A-4 009 573).

This type of pipe fastening has become quick and easy to install very well enforced. There are actually only two noteworthy problems with this laying system. First, the laminating film must be very stable and tear-resistant be a secure fixation of the pipe, especially in curved areas has strong tensions to ensure. Such a film is often used reinforced with nets or braids, which of course on the other hand increases leads to an increase in price. On the other hand, the pipe tension in the bend area causes that the plastic needles are partially pulled out of the foam until their barbs have spread under the film, causing the pipe is raised and the height is not exactly fixed. With all known Systems, this required inaccuracy in height fixation at least 1 cm.

Due to the increasing use of so-called tile screeds, which are now only extreme are thin, but with a minimum pipe coverage for safety reasons is necessary, the inaccurate height fixation means that actually one greater screed thickness is required, which naturally leads to an increase in price, or the embedding in screed remains insufficient.

In previous tacker systems, the anchoring took place in that the Barb the plastic needle when pressed into the laminated insulation approached the shaft and then in the foam area after piercing the film spread again and then after a certain extension path under the film anchored.

If the depth of penetration and thus the extension path were chosen too short, the barbs did not spread sufficiently so that the needle passed through the even the hole pushed into the film slipped out again. The flexibility of the Barbs have been a major problem so far. Rigid barbs have resulted too large holes in the film. Barbs that were too flexible admitted under load strongly, so that the pipe was raised even more unintentionally.

The object of the invention is to define heating pipes and others on one Floor, wall or ceiling surface to be fixed pipes or the like. More precise, more solid and to make it more resilient without making the top layer higher and more expensive To have to make claims and without that with regard to the holder or their relocation would have to be carried out with particular effort.

According to the invention, this object is achieved by a method according to the claim 1 solved. The special handling of the holder, in which this is elastic deformed state through the cover layer and itself then trying to relax leads to an anchoring movement across Plunge direction and parallel to the top layer, with the barb from the Area of the puncture hole formed during penetration under undamaged and to get firmer areas of the cover layer and thus prevent it from being pulled out, possibly also against widening of the puncture hole in the course a crack propagation are better secured. At the same time, the anchoring movement creates parallel to the top layer the possibility that the barbs can only be moved to just below the top layer and not significantly Way back to a spreading and anchoring movement of the barbs need what is traditional to a margin of the holder and with this pipes to be determined led and both in terms of anchorage security as was also disadvantageous with regard to the precision of the pipe laying.

The object of the invention is further achieved by a holder according to the claim 4 solved, in which the legs in a common plane of the U-shape adjusted by more than 5 ° to a common symmetry center plane, i.e. are then aligned to each other by 10 ° diverging or converging.

This design enables the holder to be preloaded with approximately parallel U-legs to pierce through a cover layer and then the holder itself Let relax, the barbs in a parallel to the cover layer Anchoring movement can find a hold under the top layer.

The object of the invention is further achieved with a setting tool according to the claim 11 solved, which due to its design, an elastic deformation the holder with the help of at least one deformation element on the insertion shaft of the Setting tool causes.

With the new tacker system, the needle or holder is in an unloaded state preferably spread. Due to the mechanics during the stapling process Spread is temporarily removed while the needle is being pushed in. The The needle is only inserted into the barbs just above the top of their barbs laminated foam pressed. Spread through the restoring force of the plastic the needle legs again, so that the respective outer barbs are pressed under the laminated top layer of the foam. This effect is reinforced by the intrinsic flexibility of the barbs.

By a small spreading angle of the barb, which is due to the self-spreading the needle is sufficient to move directly under the To get the top layer, much of the force is due to the pipe tension caught, since the barb spreads only slightly to the side and the transfers most of the force directly to the tip as pressure.

At the specified maximum spread angle of 25 degrees, the barb can absorb about four times the force of inherent stability through this force redirection.

The fact that the needle or holder immediately after the "stapling process" (Setting process) anchored under the laminating film, a partial pulling out prevents what is important on the one hand due to the screed thickness, on the other Side results in a partial withdrawal of the needle in conventional systems to the fact that, due to the oblique lateral pressure, the tension of the tube in the bend area gives a leverage effect that leads to the The needle tears out more easily. This traditionally led to the use of more expensive and more stubborn reinforced foils than top layers with the new system are unnecessary by avoiding leverage.

Fig. 1

Frontansicht eines Halters,

Fig. 2

Ansicht eines Halters im Einsatz mit Schnitt durch ein Rohr und eine Isolierstoffplatte mit Deckschicht,

Fig. 3

Schnitt durch ein Setzgerät mit einem Halter nach Fig. 1 und 2 in Frontansicht und mit schnittbildlicher Wiedergabe eines Rohrs und einer Isolierstoffplatte mit Deckschicht,

Fig. 4

Schnitt nach Linie IV-IV in Fig. 3, ohne Rohr und Isolierstoffplatte und

Fig. 5

Schnitt durch ein Setzgerät entsprechend Fig. 3 zu einer abgewandelten Ausführungsform.

Embodiment for the object are shown in the drawing and described in more detail below. The drawing shows:

Fig. 1

Front view of a holder,

Fig. 2

View of a holder in use with a section through a pipe and an insulating plate with a cover layer,

Fig. 3

Section through a setting tool with a holder according to FIGS. 1 and 2 in front view and with a sectional representation of a tube and an insulating plate with cover layer,

Fig. 4

Section along line IV-IV in Fig. 3, without pipe and insulating plate and

Fig. 5

Section through a setting tool according to FIG. 3 to a modified embodiment.

The holder for underfloor heating pipes shown in FIG. 1, designated overall by 1 - also called "plastic clips" or "tacking needle" - is essentially U-shaped with a curved U-web 2, which with an arcuate inner contact surface 3 adapted to the circular profile of a pipe to be laid is and on both sides in U-legs 4 and 5, the pointed piercing ends 6.7 and barbs 8.9 diagonally swept backwards to the Have outsides and 10,11 on the inside. In its basic form it is Holder 1 designed in mirror image to a symmetry center plane 12. He points continue on the U-legs 4.5 in the transition to the U-bridge 2 shoulders 13.14 on, which, as will be illustrated, a setting tool attack shoulders present.

The embodiment described so far in accordance with holders of prior art Design shows in a new way an employment of the U-legs 4.5 or with respect to the central plane 12, which is new and essential. The angular position the U-leg is in the form of an outward spread, albeit a converging employment in principle, although not with the same size Advantages, appears usable.

The angular adjustment of the U-legs 4.5 to each other creates one of the configuration to be aimed for when piercing with parallel to each other U-legs have a shape with particularly favorable anchoring.

2, the holder 1 is shown in an operating position in which it has a tube 15 includes and engages with its U-legs 4.5 in an insulating plate 16 and thereby engages behind a cover layer 17. The decisive factor for the anchoring is in primarily the top layer 17, which also has an appropriate anchoring itself could offer without the insulating plate 16. In this respect, under "top layer" understood an anchoring layer in the form of a film, a fabric or the like be, with an underlay or a support for the top layer like that Insulating plate 16 is actually unnecessary. The insulating plate 16 is usually a foam sheet, but could in the same way by other material like Fiber fleece or the like. Be realized, the ones considered here first Insulating panels regularly light and for anchoring holders of the in The species to be considered are insufficiently firm. It is also understood that such plates in a predetermined unit size, to be assembled only on site Webs or can exist in loose layers.

In the use position according to FIG. 2, the holder 1 engages behind the cover layer 17 with its external barbs 8.9 with little play, with the upper side its contact surface 3 (Fig. 1) abuts the tube. The illustrated thereby scarce dimensioning comes with the special design and use of the holder 1 possible, which is in an elastically deformed state with parallel U-legs 4.5, the cover layer 17 penetrates and then back in the direction 1 looking to relax, the U-leg 4.5 reach the edges of piercing holes 18, 19 which are at a distance from one another and the external barbs 8.9 also in horizontal Move towards the underside along the cover layer 17 away from the edge of the hole and are supported approximately vertically against the top layer. This is a special one stable configuration in which the barbs absorb only small lateral forces have and are relatively far from the holes 18,19.

A tendency of the tube 15 to shift upwards is effective in this way encountered. A lateral deflection of the pipe is also well absorbed, especially the obliquely outwardly directed U-legs 4.5 obliquely in the direction of loading, i.e. run in the direction of pull and thus cheap.

In the above it can be seen that the anchoring of a holder 1 is not as with conventional holders, the barbs alone fall, but that one controlled deformation of the holder overall a much more effective hooking movement triggers with predominantly horizontal direction of action, so that the Barbs are also relatively rigid in terms of the anchoring function can be and their compliance only a contact with the associated U-leg considering the small puncture holes to be kept seems important.

It can also be seen that the functional heavyweight is the external one Barb 8.9 comes, while the internal barb 10.11 support the spreading movement after piercing the cover layer 17, are unnecessary in terms of anchoring itself.

Such a holder have an angle of attack of the U-legs 4.5 Middle plane of symmetry 12 from 5 ° to 25 °, in the present case from about 10 °, see above that the two U-legs are at an angle of 20 ° to each other. The Barbs form an angle of approximately 25 ° to the legs on which they are attached sit.

Such holders should expediently be processed with the aid of setting tools, as they are usually used, for example from one Holder magazine Hold the holder one after the other in a riser from where it is by means of a manually, pneumatically or electrically operated pressure stamp be pushed downwards. Such a setting tool must for the present Case besides the conventional functions also the desired one Achieve elastic deformation of the holder when piercing.

3 and 4, a setting tool designated as a whole by 20 is only partially in the area a setting shaft 21 with a pressure stamp slidably mounted over it 22 shown within a surrounding device-side housing part 23, wherein the pressure stamp 22 presses on the shoulders 13, 14 of the holder 1, like this basically also happens with known holders. In the present It is important, however, that the pressure stamp is only on these shoulders 13, 14 is present and external lines of action 24, 25 during its feed movement in terms of resulting compressive forces, while in the area of curved U-bridge 2 does not abut, but provides a free escape space.

In the middle area there is a restraining deformation element on the setting tool 26 in the form of an inhibiting cam protruding from the side into the setting shaft provided that the holder 1, pushed down by the pressure stamp 22, holds in the middle and bends together so that it is about a assumes parallel leg position until the piercing ends 6, 7 of the holder 1, such as illustrated in Fig. 3, the cover layer 17 have pierced. In the further Pricking the holder cannot loosen its tense position at first, since it is fixed from the puncture holes until the barbs, in particular the outer barbs 8, 9 which have passed through the cover layer 17. So can the inhibiting cam 26 may be arranged rigidly so that the holder with its U-web 2 only with elastic and also plastic deformation over them bring is. However, it goes without saying that the inhibition cam (or a pair of each other opposite) can also be resilient to the inhibiting effect Dosing spring forces.

An alternative embodiment for a setting tool 27 with a setting shaft 28 and a stamp 29 is illustrated in Fig. 5, with a holder laterally enclosing housing 31 is provided. One to use here Holder 32 is simplified compared to holder 1 with the elimination of shoulder extensions 13, 14. The pressure stamp is designed so that it is on a U-web 33 of the holder 32 presses and its outer surface adapted with a concave stamp surface is.

The desired deformation is due to the inclined sliding surfaces on both sides 34.35 achieved the holder from a (not shown) relaxed starting position squeeze together from both sides as the plunger 29 advances, so that it has to be pierced into a cover layer with approximately parallel U-legs.

Claims (9)

1. Method of fitting pipes (15), in particular floor heating pipes, to a cover layer (17) that can be pierced through, particularly laminated film, to insulating panels or strips, in which holders (1,31) which are manufactured essentially in a U-shape and are provided on the legs (4, 5) with piercing ends (6, 7) and external barbs (8, 9, 10, 11) are inserted by means of a setting device (20, 27) fitted with a piston (22, 28) over the pipe (15) and into the cover layer (17) and are secured behind it by means of the barbs, characterised in that the holders (1, 31) are deformed and pre-stressed elastically from an initial expanded shape to a piercing shape, with roughly parallel legs, and for the purpose of varying the distance between the piercing ends (6, 7), before they are inserted in the cover layer, and are released so that they move in the direction of the barbs after the barbs (8, 9) have penetrated the cover layer (17).
2. Method according to claim 1, characterised in that the holders (1, 31) are loaded by deformation elements (26, 33) of the setting device (20, 27) during the insertion movement performed by the piston (22, 28).
3. Holder (1, 31) for implementing the method according to one of claims 1 and 2, whose essentially U-shaped design comprises two legs (4, 5), with piercing ends (6, 7) and external barbs (8, 9, 10, 11), and which is formed from elastic material, particularly plastic, characterised in that the legs (4, 5) are arranged in a common plane at an oblique angle of over 5° to a common central plane of symmetry (12), barbs (8, 9) aligned almost in parallel to the central plane (12) being arranged on the legs, the ends of which barbs being arranged at a distance from an inner contact face (3) of the holder (1) approximately equal to the diameter of a pipe (15) to be secured with a connecting line which lies in a cover layer (17), approximately on its underside, when the holders are anchored.
4. Holder (1, 31) according to claim 3, characterised in that the legs (4, 5) are arranged at a maximum angle of 25°.
5. Support (1, 31) according to claim 3 or 4, characterised in that the legs (4, 5) are arranged at an angle of approximately 10°.
6. Support (1, 31) according to claim 3, characterised in that the barbs (8, 9, 10, 11) form an angle of approximately 25° to the associated legs (4, 5).
7. Setting device (20, 27) for implementing the method according to one of claims 1 and 2, in which a U-shaped support (1, 31) with piercing ends, to be set over a pipe (15), must be inserted in a cover layer (17) and anchored in it by means of barbs (8, 9, 10, 11), and in which the support (1, 31) is pushed out by means of a piston (22, 29) in a setting shaft (21, 28), characterised in that the setting shaft (21, 28) exhibits at least one deformation element (26, 33, 39) engaging with the holder (1, 31), which element transforms the holder (1, 31) into a piercing shape with roughly parallel legs when pushed out of an expanded initial shape.
8. Setting device (20) according to claim 7, characterised in that the setting shaft (21) exhibits at least one deformation element (26) retaining the holder in a central area, and in that the piston (22) exhibits two pressure surfaces with their lines of action (24, 25) at some distance from each other and from the deformation element (26).
9. Setting device (27) according to claim 7, characterised in that the setting shaft (28) exhibits oblique lateral opposing sliding faces (33, 34) as deformation elements which act on the U-legs and barbs of the holder (31) to be set whilst they are pushed out.

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